Arrow firing retrofits

[blarg]

It looks like the verminator (if I may reach for such a lofty benchmark) is pushing 42ft/lbs @ 290fps so mathing it yeilds a 250gr (ish) arrow.
My cheapy carbons lump in at 500gr, so while I understand the need for speed, predictable energy on parabola is the goal.
A small scale for your bolts and a gram/grain conversion would tell you (me too please) what sort of energy you're shooting.
I would hazard a guess it is higher then via lead. Compressed gas seems more like a slingshot moving heavy things slowly as much efficient.

Thanks for the post, nice thread there.
Ref:
http://www.airgunsofarizona.com/FXVe...orExtreme.html